I'm so sorry to read about the tongue/taste thing. Damn. I didn't have tongue surgery but my neck dissection left me with half my tongue numb and unable to taste. Tasting food with half the available taste buds is, as one would expect, about half as fulfilling. But in the 14 months since surgery I've just become accustomed to it. The fact that you will too is no consolation, I know, and I wish I could wave a magic wand for you!
Getting on an anti-depressant is going to make a world of difference, I guarantee it. Prozac saved my life during a couple of tough periods years before I had cancer. I have no doubt that the newer and more effective SSRIs, assuming that's what they give you and I think they will, will be even better.
I, and we all, are here for you. So fire away whenever you want!
D2